Sponge mop



FIG. 1 is a top right front perspective view of a sponge mop showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side, with the exception of the number and placement of the grooves as shown in FIGS. 1 and 2, being the same;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front elevational view thereof, the rear, with the exception of each of the grooves being placed further to the left as shown in FIGS. 1 and 2, being the same. 

The ornamental design for a sponge mop, as shown and described. 